* Added page selection to the Alternate Mix.* Added Normalize page size to the Merge settings.* Grouped some setting under Advanced settings.* Added lenient/non lenient tasks execution.* Added a Clear all settings item to the Clear button.* Added close button to the notifications.* Removed themes.* Fixed an issue that could cause tasks to be executed before modal windows shows up.* A number of fixes to the underlying PDF engine (SAMBox + Sejda).